US9420149B2 - Integrated depth camera - Google Patents

Integrated depth camera Download PDF

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Publication number
US9420149B2
US9420149B2 US14/458,298 US201414458298A US9420149B2 US 9420149 B2 US9420149 B2 US 9420149B2 US 201414458298 A US201414458298 A US 201414458298A US 9420149 B2 US9420149 B2 US 9420149B2
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Prior art keywords
lighting
depth camera
board
control
module
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US14/458,298
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US20160050346A1 (en
Inventor
Ling-Wei Liu
Hung-Chang Tsai
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Lips Corp
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Lips Corp
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Priority to US14/458,298 priority Critical patent/US9420149B2/en
Assigned to LIPS CORPORATION reassignment LIPS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIU, LING-WEI, TSAI, HUNG-CHANG
Priority to US14/564,021 priority patent/US9609184B2/en
Publication of US20160050346A1 publication Critical patent/US20160050346A1/en
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Classifications

    • H04N5/2252—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
    • G01S7/4815—Constructional features, e.g. arrangements of optical elements of transmitters alone using multiple transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
    • G01S17/894—3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G01S7/4813—Housing arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/017—Gesture based interaction, e.g. based on a set of recognized hand gestures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G06K9/00335—
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/141—Control of illumination
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/20—Movements or behaviour, e.g. gesture recognition
    • H04N13/0253—
    • H04N13/0271—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/254—Image signal generators using stereoscopic image cameras in combination with electromagnetic radiation sources for illuminating objects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/271—Image signal generators wherein the generated image signals comprise depth maps or disparity maps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/51—Housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/56—Cameras or camera modules comprising electronic image sensors; Control thereof provided with illuminating means

Definitions

  • the invention relates to cameras, particularly to depth cameras.
  • a depth camera can be used to control a computer through a gesture. Moreover, a depth camera can be further used to control a TV game through a body motion. This makes human-machine interaction more intuitive.
  • Such human-machine interaction needs a depth camera which can store a three-dimensional image into a two-dimensional format.
  • a depth camera can measure a Z-axis distance between every shot point and the camera so that it can record three-dimensional image data.
  • a common method for measuring the Z-axis distance is to use the principle of time of flight (TOF). Simply speaking, a time period from a light beam emitted by a light source to be reflected by a shot point to come back to the origin can be used to calculate the Z-axis distance.
  • TOF time of flight
  • the light source is an essential element of the TOF principle.
  • a conventional TOF depth camera is provided with multiple light sources. To ensure the light beams from the light sources are absolutely parallel, each light source is further provided with a reflector. However, the reflectors are separate parts which must be individually installed over the light sources. Such installation always makes the light beams deflective, and finally, the distance measurement will be inaccurate.
  • An object of the invention is to provide an integrated depth camera, which has a modularized light source set. This can simplify the installation process of the light source set and ensure the accuracy of installation.
  • the depth camera of the invention includes a control module and a lighting module.
  • the control module includes a control board, a control unit mounted on the control board, a seat mounted on the control board and over the control unit and a lens rooted in the seat.
  • the lighting module is superposed on the control module and includes a lighting board with a through hole for receiving the lens, lighting units mounted on the lighting board and a reflector set composed of a base plate and reflectors formed thereon. Each reflector has an opening surrounding one of the lighting units.
  • FIG. 1 is an exploded view of the invention
  • FIG. 2 is an assembled view of the invention
  • FIG. 3 is a sectional view of the invention.
  • FIG. 4 is a schematic view of the invention.
  • the depth camera of the invention includes a control module 1 and a lighting module 2 .
  • the control module 1 and the lighting module 2 are installed in a case 3 .
  • the control module 1 further includes a control board 11 .
  • a control unit 12 is mounted on the control board 11 .
  • the control unit 12 is a control chip for controlling the operation of the depth camera.
  • a seat 13 is mounted on the control board 11 .
  • the seat 13 is formed with a connecting hole 131 surrounding the control unit 12 .
  • An edge of the connecting hole 131 is formed with a thread 132 .
  • a lens 14 is rooted in the connecting hole 131 and electrically connected to the control unit 12 .
  • the lens 14 has a connecting end 141 with a thread for screwing with the connecting hole 131 .
  • the lighting module 2 includes a lighting board 21 electrically connected to the control board 11 .
  • the lighting board 21 is formed with a through hole 211 for receiving the lens 14 .
  • the lens 14 passes through the lighting board 21 as shown in FIG. 3 .
  • the lighting board 21 is mounted by multiple lighting units 22 under control of the control unit 21 .
  • the lighting units 22 are arranged in a line and beside the through hole 211 .
  • the lighting units 22 may be an infrared or laser light source.
  • the lighting board 21 is provided with at least one reflector set 23 . In the shown embodiment, the reflector set 23 is two in number.
  • Each reflector set 23 includes a base plate 231 and multiple reflectors 232 mounted thereon.
  • each reflector 232 is formed with an opening 233 surrounding one of the lighting units 232 .
  • the base plate 231 is provided with fixing rods 234 for being inserted into fixing holes 212 of the lighting board 21 .
  • the lighting units 22 are separately surrounded by the reflectors 232 in a one-to-one manner as shown in FIG. 3 .
  • the lighting units 22 of the lighting module 2 are installed with the reflectors 232 in a module manner.
  • the lighting units 22 emit light beams while the depth camera is working, and the reflectors 232 can keep the light beams concentrative to reach the shot object (as the arrows shown in the figure).
  • the modularized reflectors 23 ensure the installing accuracy and simplify the installing process.

Abstract

The depth camera includes a control module and a lighting module. The control module includes a control board, a control unit mounted on the control board, a seat mounted on the control board and over the control unit and a lens rooted in the seat. The lighting module is superposed on the control module and includes a lighting board with a through hole for receiving the lens, lighting units mounted on the lighting board and a reflector set composed of a base plate and reflectors formed thereon. Each reflector has an opening surrounding one of the lighting units.

Description

BACKGROUND OF THE INVENTION
1. Technical Field
The invention relates to cameras, particularly to depth cameras.
2. Related Art
A depth camera can be used to control a computer through a gesture. Moreover, a depth camera can be further used to control a TV game through a body motion. This makes human-machine interaction more intuitive.
Such human-machine interaction needs a depth camera which can store a three-dimensional image into a two-dimensional format. A depth camera can measure a Z-axis distance between every shot point and the camera so that it can record three-dimensional image data.
A common method for measuring the Z-axis distance is to use the principle of time of flight (TOF). Simply speaking, a time period from a light beam emitted by a light source to be reflected by a shot point to come back to the origin can be used to calculate the Z-axis distance.
Therefore, the light source is an essential element of the TOF principle. A conventional TOF depth camera is provided with multiple light sources. To ensure the light beams from the light sources are absolutely parallel, each light source is further provided with a reflector. However, the reflectors are separate parts which must be individually installed over the light sources. Such installation always makes the light beams deflective, and finally, the distance measurement will be inaccurate.
SUMMARY OF THE INVENTION
An object of the invention is to provide an integrated depth camera, which has a modularized light source set. This can simplify the installation process of the light source set and ensure the accuracy of installation.
To accomplish the above object, the depth camera of the invention includes a control module and a lighting module. The control module includes a control board, a control unit mounted on the control board, a seat mounted on the control board and over the control unit and a lens rooted in the seat. The lighting module is superposed on the control module and includes a lighting board with a through hole for receiving the lens, lighting units mounted on the lighting board and a reflector set composed of a base plate and reflectors formed thereon. Each reflector has an opening surrounding one of the lighting units.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of the invention;
FIG. 2 is an assembled view of the invention;
FIG. 3 is a sectional view of the invention; and
FIG. 4 is a schematic view of the invention.
 DETAILED DESCRIPTION OF THE INVENTION
Please refer to FIGS. 1 and 2. The depth camera of the invention includes a control module 1 and a lighting module 2. The control module 1 and the lighting module 2 are installed in a case 3. As shown in FIG. 2, the control module 1 further includes a control board 11. A control unit 12 is mounted on the control board 11. In the shown embodiment, the control unit 12 is a control chip for controlling the operation of the depth camera. A seat 13 is mounted on the control board 11. The seat 13 is formed with a connecting hole 131 surrounding the control unit 12. An edge of the connecting hole 131 is formed with a thread 132. A lens 14 is rooted in the connecting hole 131 and electrically connected to the control unit 12. The lens 14 has a connecting end 141 with a thread for screwing with the connecting hole 131.
The lighting module 2 includes a lighting board 21 electrically connected to the control board 11. The lighting board 21 is formed with a through hole 211 for receiving the lens 14. In other words, the lens 14 passes through the lighting board 21 as shown in FIG. 3. The lighting board 21 is mounted by multiple lighting units 22 under control of the control unit 21. The lighting units 22 are arranged in a line and beside the through hole 211. The lighting units 22 may be an infrared or laser light source. The lighting board 21 is provided with at least one reflector set 23. In the shown embodiment, the reflector set 23 is two in number. Each reflector set 23 includes a base plate 231 and multiple reflectors 232 mounted thereon. The bottom of each reflector 232 is formed with an opening 233 surrounding one of the lighting units 232. The base plate 231 is provided with fixing rods 234 for being inserted into fixing holes 212 of the lighting board 21. The lighting units 22 are separately surrounded by the reflectors 232 in a one-to-one manner as shown in FIG. 3.
Please refer to FIG. 4. As shown, the lighting units 22 of the lighting module 2 are installed with the reflectors 232 in a module manner. The lighting units 22 emit light beams while the depth camera is working, and the reflectors 232 can keep the light beams concentrative to reach the shot object (as the arrows shown in the figure). The modularized reflectors 23 ensure the installing accuracy and simplify the installing process.
It will be appreciated by persons skilled in the art that the above embodiment has been described by way of example only and not in any limitative sense, and that various alterations and modifications are possible without departure from the scope of the invention as defined by the appended claims. It will be appreciated by persons skilled in the art that the above embodiment has been described by way of example only and not in any limitative sense, and that various alterations and modifications are possible without departure from the scope of the invention as defined by the appended claims.

Claims (6)

What is claimed is:
1. A depth camera comprising:
a control module comprising:
a control board;
a control unit, mounted on the control board;
a seat, mounted on the control board and over the control unit, and having a connecting hole surrounding the control unit; and
a lens, rooted in the connecting hole of the seat; and
a lighting module, superposed on and electrically connected to the control module, comprising:
a lighting board, having a through hole for receiving the lens, and electrically connected to the control unit;
lighting units, mounted on the lighting board; and
a reflector set, having a base plate and multiple reflectors formed thereon, and each reflector having an opening surrounding one of the lighting units.
2. The depth camera of claim 1, wherein the base plate is provided with fixing rods, multiple fixing holes are formed in the lighting board so that the fixing rods are separately inserted into the fixing holes.
3. The depth camera of claim 1, wherein the lighting units are infrared or laser light sources.
4. The depth camera of claim 1, wherein the lens has a connecting end with a thread.
5. The depth camera of claim 4, wherein an edge of the connecting hole is formed with a thread for screwing with the connecting end.
6. The depth camera of claim 1, further comprising a case receiving the control module and the lighting module.
US14/458,298 2014-06-13 2014-08-13 Integrated depth camera Active 2035-03-10 US9420149B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/458,298 US9420149B2 (en) 2014-06-13 2014-08-13 Integrated depth camera
US14/564,021 US9609184B2 (en) 2014-06-13 2014-12-08 Depth camera

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Application Number Priority Date Filing Date Title
TW103210475U 2014-06-13
TW103210475 2014-06-13
US14/458,298 US9420149B2 (en) 2014-06-13 2014-08-13 Integrated depth camera

Related Child Applications (1)

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US14/564,021 Continuation-In-Part US9609184B2 (en) 2014-06-13 2014-12-08 Depth camera

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US9420149B2 true US9420149B2 (en) 2016-08-16

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US14/564,021 Active 2034-11-12 US9609184B2 (en) 2014-06-13 2014-12-08 Depth camera

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US20160050347A1 (en) 2016-02-18
CN204156959U (en) 2015-02-11
TWM495545U (en) 2015-02-11
US9609184B2 (en) 2017-03-28
US20160050346A1 (en) 2016-02-18

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Owner name: LIPS CORPORATION, TAIWAN

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